25. For first to be eschewed is that capital lie and far to be fled from, which is done in doctrine of religion; to which lie a man ought by no consideration to be induced. The second, that he should hurt some man unjustly: which is such that it profits no man and hurts some man. The third, which so profits one as to hurt another, but not in corporal defilement. The fourth, that which is done through only lust of lying and deceiving, which is an unmixed lie. The fifth, what is done with desire of pleasing by agreeableness in talk. All these being utterly eschewed and rejected, there follows a sixth sort which at once hurts nobody and helps somebody; as when, if a person's money is to be unjustly taken from him, one who knows where the money is, should say that he does not know, by whomsoever the question be put. The seventh, which hurts none and profits some: except if a judge interrogate: as when, not wishing to betray a man who is sought for to be put to death, one should lie; not only a just and innocent, but also a culprit; because it belongs to Christian discipline neither to despair of any man's amendment, nor to bar the way of repentance against any. Of which two sorts, which are wont to be attended with great controversy, we have sufficiently treated, and have shown what was our judgment; that by taking the consequences, which are honorably and bravely borne, these kinds also should be eschewed by brave and faithful and truthful men and women. The eighth sort of lie is that which hurts no man, and does good in the preserving somebody from corporal defilement, at least that defilement which we have mentioned above. For even to eat with unwashen hands the Jews thought defilement. Or if a person think this also a defilement, yet not such that a lie ought to be told to avoid it. But if the lie be such as to do an injury to any man, even though it screen a man from that uncleanness which all men abhor and detest; whether a lie of this kind may be told provided the injury done by the lie be such as consists not in that sort of uncleanness with which we are now concerned, is another question: for here the question is no longer about lying, but it is asked whether an injury ought to be done to any man, even otherwise than by a lie, that the said defilement may be warded off from another. Which I should by no means think: though the case proposed be the slightest wrongs, as that which I mentioned above, about a single measure of wheat; and though it be very embarrassing whether it be our duty not to do even such an injury to any man, if thereby another may be defended or screened from a lustful outrage upon his person. But, as I said, this is another question: at present let us go on with what we have taken in hand: whether a lie ought to be told, if even the inevitable condition be proposed that we either do this, or suffer the deed of lust or some execrable pollution; even though by lying we do no man harm.

42. [...] There must therefore be no lying in the doctrine of piety: it is a heinous wickedness, and the first sort of detestable lie. There must be no lying of the second sort; because no man must have a wrong done to him. There must be no lying of the third sort; because we are not to consult any man's good to the injury of another. There must be no lying of the fourth sort, that is, for the lust of lying, which of itself is vicious. There must be no lying of the fifth sort, because not even the truth itself is to be uttered with the aim of men-pleasing, how much less a lie, which of itself, as a lie, is a foul thing? There must be no lying of the sixth sort; for it is not right that even the truth of testimony be corrupted for any man's temporal convenience and safety. But unto eternal salvation none is to be led by aid of a lie. For not by the ill manners of them that convert him is he to be converted to good manners: because if it is meet to be done towards him, himself also ought when converted to do it toward others; and so is he converted not to good, but to ill manners, seeing that is held out to be imitated by him when converted, which was done unto him in converting him. Neither in the seventh sort must there be any lying; for it is meet that not any man's commodity or temporal welfare be preferred to the perfecting of faith. Not even if any man is so ill moved by our right deeds as to become worse in his mind, and far more remote from piety, are right deeds therefore to be foregone: since what we are chiefly to hold is that whereunto we ought to call and invite them whom as our own selves we love; and with most courageous mind we must drink in that apostolic sentence: "To some we are a savor of life unto life, to others a savor of death unto death; and who is sufficient for these things?" Nor in the eighth sort must there be lying: because both among good things chastity of mind is greater than pudicity of body; and among evil things, that which ourselves do, than that which we suffer to be done. In these eight kinds, however, a man sins less when he tells a lie, in proportion as he emerges to the eighth: more, in proportion as he diverges to the first. But whoso shall think there is any sort of lie that is not sin, will deceive himself foully, while he deems himself honest as a deceiver of other men.